H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 12/56 (2006.01) H04Q 3/64 (2006.01) H04Q 11/04 (2006.01) H04Q 11/08 (2006.01)
Patent
CA 2114002
ABSTRACT OF THE DISCLOSURE A digital switch serves a number of terminal units for switching signal traffic therebetween, said traffic being logically divided into data time slots and control time slots with control packets. It comprises a switch memory for receiving said data time slots, a control memory containing information for facilitating through connection of said data time slots in said switch memory, a control memory terminal for receiving said control time slots and control packet located therein, and writing information into the control memory, and for transmitting acknowledgement packets to called and calling ones of said terminal units, and an occupied/unoccupied memory cooperating with said control memory terminal and storing actual status of each of said terminal units. A queue system is associated with said control memory terminal and said occupied/unoccupied memory, said queue system including memory means and control logic means for effecting, in case a first terminal unit tries to establish connection to a second terminal unit, which is occupied, queueing of a call request and transmission to said first terminal unit of an acknowledgement "request for connection queued" and, at the receipt of a request for disconnection from said second terminal unit, direct connection of said first terminal unit to said second terminal unit, and transmission of acknowledgements to said first and second terminal units with the information "connection effected" and "request effected", respectively.
Marks & Clerk
Telefonaktiebolaget Lm Ericsson
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